Draft-regulator.



H. D. PRYMIRE, JR. DRAFT REGULATOR.

APPLIGATION FILED SEPT.18,1908.

Patented 0013.5,1909.

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HARDIN D. FRYMIRE, JR.,

,OF GALESBURG, ILLINOIS.

DRAFT-REGULATOR.

To all whom it may concern:

Be it known that I, HARDIN I). FRYMIRE, J12, a citizen of the UnitedStates, residing at Galesburg, in the county of Knox and State ofIllinois, have invented new and use ful Improvements inDraft-Regulators, of which the following is a specification.

This invention relates to draft regulators for stoves, furnaces and thelike, and it has for its object to provide a device of this class ofsimple and thoroughly efficient construction whereby the draft door andthe flue damper of a stove or furnace may be manipulated from variouspoints at a dis tance from such stove or furnace, thus controlling thedraft of the same and regulating the degree of heat.

Further objects of the invention are to simplify and improve theconstruction and operation of this class of devices.

lVith these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claim.

In the accompanying drawings has been illustrated a simple and preferredform of the invention; it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited,but that changes, alterations and modifications within the scope of theinvention may be resorted to when desired.

In the drawing, Figure 1 is a front view of a casing containing theimproved draft regulator. Fig. 2 is a horizontal transverse sectionalview taken on the plane indicated by the line 22 in Fig. 1. Fig. 3 is avertical sectional view taken on the plane indicated by the line 33 inFig. 2. Fig. l is a sectional detail view taken on the plane indicatedby the line l l in Fig. 2.

Corresponding parts in the several figures are denoted by likecharacters of reference.

The casing of the improved device comprises a base plate 1 having sideflanges or cheeks 22 supporting a shaft 3, the noncircular ends of whichare fitted in corresponding apertures in the cheeks where the shaft isthus supported against rotation. Mounted rotatably upon the shaft 3 arepul leys 4l5, each of which is provided with a recess 6 wherein isdisposed a spiral spring 7,

Specification of Letters Patent.

Application filed September 18, 1908.

Patented Oct. 5, 1909.

Serial No. 453,583.

the ends of which are attached respectively to the pulley casing and tothe shaft 3, so that, by rotating the pulley upon the shaft, the springmay be placed under tension. Suitably attached to and connected witheach of the pulleys 4-4) is a chain S9, said chains being partly woundupon the pulleys in such a manner that by pulling the free end of thechain to unwind it from the pulley, the latter will be rotated, and thespring placed under tension, while by relaxing the pulley upon the freeend of the chain, the tension of the spring will be exerted to so rotatethe pulley as to wind the chain thereupon. Each of the pulleys isprovided with a recess or bore 10 disposed tangentially and terminatingadjacent to the shaft 3, which latter is provided adjacent to the innerend of each recess 10 with a socket 11 adapted to accommodate a ball orspherical member 12 disposed in the bore or recess. WVhen the ball 12 isseated in the socket 11, it will proj ect from the shaft, as will beclearly seen in Fig. l, and will lie in the path of the inner end of therecess or bore 10, thus obstructing the rotation of the pulley under theim pulling the chain connected with the pulley in such a manner as torotate the latter to wind the spring more tightly, the bore or recess 10will be tilted to an inclined position, substantially as shown in dottedlines in Fig. t thus permitting the ball to roll toward the outer end ofthe bore or recess 10, which is provided with a stop plug 13; then, byletting go of the chain, the pulley will be rotated rapidly under theimpulse of the spring, and the ball, by the centrifugal action thusintroduced, will remain at the outer end of the recess or bore 10 untilthe limit of rotation of the pulley has been reached. The ball 12 thusconstitutes a centrifugal stop device for checking the spring actuatedpulley in a predetermined position. The spring actuated pulleys are inpractice covered from view by means of a shield or casing 14 suitablysecured upon the baselate. p A washer or partition member is preferablyinterposed between the pulleys upon the shaft 3, as will be seen in Fig.2 of the drawings, thus separating the springs disposed in the recesses6, which latter are preferably formed in the inner, adjacent ends of thepulleys.

pulse of the spring connected therewith; by

The improved device is in practice mounted for operation in the upperstory of the building Where the stove or furnace, the draft of which isto be regulated, is located in the basement or lower story. The freeends of the chains 8 and 9 wound upon the pulleys 4 and 5 are to beconnected respectively with the draft door and the flue damper of suchstove or furnace, said chains being suitably guided in such a manner asto be conveniently accessible at various intermediate points from whichit may be desired to control the draft. Normally, the tension of thespring will be exerted to keep the draft door and the flue damper open,said door and damper being operable to be closed by gravity. By simplymanipulating the chains, it will be seen that the pulleys may be partlyrotated to effect any desired adjustment of the draft door and thedamper, the same being sustained in adjusted position by means of thecheck devices connected. with the pulleys as herein described.

This improved device is simple in con struction, easily operated andthoroughly efficient for the purposes for which it is provided.

Having, thus fully described the invention, what I claim. as new is In adevice of the class described, the combination of a frame or casing, anon-rotatable shaft supported in said frame or casing and having socketsformed thereon at oppo site sides of the center thereof, pulleys mountedupon said shaft and inclosing said sockets and provided with recesses intheir opposing inner sides and having tangential bores, plugs closingthe outer ends of said bores, spiral springs disposed in said recessesand having their ends attached respectively to the pulleys and to theshaft, a partition member upon the shaft between the open ends of therecessed inner sides thereof, spherical members movably disposed in saidtangential bores to seat within said sockets in the shafts in thepulleys, and flexible operating members wound upon the pulleys andprojecting from said frame or casing.

In testimony whereof, I affix my signature,

in presence of two Witnesses.

HARDIN D. FRYMIRE, JR. Vitnesses CHAS. M. CoMEGYs, CHAs. E. LU'rz.

